James w



(No Model.)

J. W. SHINN.

LOOOMOTIVE MACHINERY.

No. 432,090. Patented July 15, 1890.

UNITED STATES PATENT OFFICE JAMES WV. SI-IINN, OF ALEXANDRIA, VIRGINIA,ASSIGNOR OF ONE-HALF TO ELI H. JANNEY, OF SAME PLACE.

LOCOMOTIV E MACHINERY.

SPECIFICATION forming part of Letters Patent No. 432,090, dated. July15, 1890.

Application filed September 25, 1889. Serial No. 325,062. (No model.)

To aZZ whom it may concern.-

Be it known that I, JAMES W. SHINN, a citizen of the United States,residing at Alexand ria, in the county of Alexandria and State ofVirginia, have invented certain new and useful Improvements inLocomotive Machinery; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it to appertains to make and use thesame, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

Figure 1 shows the mechanism to which the I 5 invention is to beapplied. Fig. 2 shows the invention applied. Figs. 3 and t showdifferent forms of rods or bars used in carrying out the invention.

In the operation of locomotives among the e parts liable to break theconnection of the link-motion is perhaps more likely to give way thanany other. The result is often very annoyin g and frequently causes muchdelay. It sometimes happens that the train is too 2 5 heavy to be runwith one cylinder, and part of the train has to be side-tracked andleft. Should the break occur on a curve, great difli culty isexperienced in even starting atrain.

It is the object of the present invention to 0 provide an auxiliarydevice always at hand which can be substituted for a radius-bar shouldany part of the eccentriceonnection be broken.

The invention consists in the device here- 3 5 inafter pointed out.

In the annexed drawings, the letter A indicates the drive-shaft ofaloeomotive, on which are the usual eccentrics a, at. About theseeccentrics are the eccentric-straps B B. To

these, at b b',are secured the radii-arms C C,

which at their other ends are pivoted to the link D. E is thereversinglever, and F the valve-connection.

In Figs. 3 and 4 are shown the devices which I propose to use should oneof the eccentric connections break.

The rod M is provided with turn ed-out ends m on, there being preferablycollars m m thereon. These ends m m are to be nutted. Instead of a rod,a flat bar N may be used with holes a at its ends, and separable boltsalso may be used.

Upon the breakage of a connection it is removed and the rod put in itsplace. This is done by inserting one end on of the rod into the hole (1of the link D, from which the broken connection has been removed, andthe other end on into the hole Z) at the other eccentric. By using thisdevice the link is braced against the remaining radius-rod, and isprevented from being thrown out of place as the engine runs. The lengthof the connecting device M must be such that the link will be kept itsdue distance from the drive-shaft A and its true curve preserved.

Vith such a device substituted for the broken connection the locomotivecan be worked forward Without any trouble.

Having described my invention, what I claim is- The combination of theeccentric a, the radius-arm O, the link D, and the auxiliary device, thelast connected to one end of the link D and to the eccentric, as setforth.

In testimony whereof I affix my signature in 7 5 presence of twowitnesses.

JAMES \V. SHINN.

Witnesses:

R. N. CRooK, WM. FLEMING.

